Looking for an invite to Google's GrandCentral? The service has been in private beta since Google bought internet telephony company last year. While the private beta label hasn't exactly come off just yet, Google is making it a lot easier for anyone who wants a GrandCentral account to sign up for one.

Today Google posted a little note on Blogger Buzz letting users of the company's Blogger service know that they could sign up for GrandCentral accounts immediately. As far as we can tell, that link should work whether you have a Blogger account or not. But if it doesn't work for you, all you have to do is sign up for a Blogger account. They're free.

Once you have a GrandCentral account, you will be assigned a phone number that you can link with a number of real world phones. Whenever someone calls your GrandCentral number, the call can ring through to your work, home, or cellphones. You can listen to your voicemail from the web. Or you can set rules for how calls from various numbers will be treated.

What's the Blogger connection? You can also use GrandCentral's WebCall feature to add a "Call Me" button to your web page. Visitors can click the button, and GrandCentral will connect their cellphone to your number without ever showing them your phone number. You can either take the call or send all calls directly to voicemail which you can access from the web. You can even post voicemail messages to your blog using GrandCentral's embeddable audio player.